static inline int
smb_smb_read(struct smb_share *ssp, u_int16_t fid,
size_t *len, size_t *rresid, struct uio *uio, struct smb_cred *scred)
{
struct smb_rq *rqp;
struct mbchain *mbp;
struct mdchain *mdp;
u_int16_t resid, bc;
u_int8_t wc;
int error, rlen, blksz;
/* Cannot read at/beyond 4G */
if (uio->uio_offset >= (1LL << 32))
return (EFBIG);
error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_READ, scred, &rqp);
if (error)
return error;
blksz = SSTOVC(ssp)->vc_txmax - SMB_HDRLEN - 16;
rlen = *len = min(blksz, *len);
smb_rq_getrequest(rqp, &mbp);
smb_rq_wstart(rqp);
mb_put_mem(mbp, (void *)&fid, sizeof(fid), MB_MSYSTEM);
mb_put_uint16le(mbp, rlen);
mb_put_uint32le(mbp, uio->uio_offset);
mb_put_uint16le(mbp, min(uio->uio_resid, 0xffff));
smb_rq_wend(rqp);
smb_rq_bstart(rqp);
smb_rq_bend(rqp);
do {
error = smb_rq_simple(rqp);
if (error)
break;
smb_rq_getreply(rqp, &mdp);
md_get_uint8(mdp, &wc);
if (wc != 5) {
error = EBADRPC;
break;
}
md_get_uint16le(mdp, &resid);
md_get_mem(mdp, NULL, 4 * 2, MB_MSYSTEM);
md_get_uint16le(mdp, &bc);
md_get_uint8(mdp, NULL); /* ignore buffer type */
md_get_uint16le(mdp, &resid);
if (resid == 0) {
*rresid = resid;
break;
}
error = md_get_uio(mdp, uio, resid);
if (error)
break;
*rresid = resid;
} while(0);
smb_rq_done(rqp);
return error;
}
static int
smb_smb_read(struct smb_share *ssp, uint16_t fid, uint32_t *lenp,
uio_t *uiop, smb_cred_t *scred, int timo)
{
struct smb_rq *rqp;
struct mbchain *mbp;
struct mdchain *mdp;
int error;
uint32_t off32;
uint16_t bc, cnt, dlen, rcnt, todo;
uint8_t wc;
ASSERT(uiop->uio_loffset <= UINT32_MAX);
off32 = (uint32_t)uiop->uio_loffset;
ASSERT(*lenp <= UINT16_MAX);
cnt = (uint16_t)*lenp;
/* This next is an "estimate" of planned reads. */
todo = (uint16_t)min(uiop->uio_resid, UINT16_MAX);
error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_READ, scred, &rqp);
if (error)
return (error);
smb_rq_getrequest(rqp, &mbp);
smb_rq_wstart(rqp);
mb_put_uint16le(mbp, fid);
mb_put_uint16le(mbp, cnt);
mb_put_uint32le(mbp, off32);
mb_put_uint16le(mbp, todo);
smb_rq_wend(rqp);
smb_rq_bstart(rqp);
smb_rq_bend(rqp);
if (timo == 0)
timo = smb_timo_read;
error = smb_rq_simple_timed(rqp, timo);
if (error)
goto out;
smb_rq_getreply(rqp, &mdp);
error = md_get_uint8(mdp, &wc);
if (error)
goto out;
if (wc != 5) {
error = EBADRPC;
goto out;
}
md_get_uint16le(mdp, &rcnt); /* ret. count */
md_get_mem(mdp, NULL, 4 * 2, MB_MSYSTEM); /* res. */
md_get_uint16le(mdp, &bc); /* byte count */
md_get_uint8(mdp, NULL); /* buffer format */
error = md_get_uint16le(mdp, &dlen); /* data len */
if (error)
goto out;
if (dlen < rcnt) {
SMBSDEBUG("oops: dlen=%d rcnt=%d\n",
(int)dlen, (int)rcnt);
rcnt = dlen;
}
if (rcnt == 0) {
*lenp = 0;
goto out;
}
/* paranoid */
if (rcnt > cnt) {
SMBSDEBUG("bad server! rcnt %d, cnt %d\n",
(int)rcnt, (int)cnt);
rcnt = cnt;
}
error = md_get_uio(mdp, uiop, (int)rcnt);
if (error)
goto out;
/* success */
*lenp = (int)rcnt;
out:
smb_rq_done(rqp);
return (error);
}
static int
smb_smb_readx(struct smb_share *ssp, uint16_t fid, uint32_t *lenp,
uio_t *uiop, smb_cred_t *scred, int timo)
{
struct smb_rq *rqp;
struct mbchain *mbp;
struct mdchain *mdp;
int error;
uint32_t offlo, offhi, rlen;
uint16_t lenhi, lenlo, off, doff;
uint8_t wc;
lenhi = (uint16_t)(*lenp >> 16);
lenlo = (uint16_t)*lenp;
offhi = (uint32_t)(uiop->uio_loffset >> 32);
offlo = (uint32_t)uiop->uio_loffset;
error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_READ_ANDX, scred, &rqp);
if (error)
return (error);
smb_rq_getrequest(rqp, &mbp);
smb_rq_wstart(rqp);
mb_put_uint8(mbp, 0xff); /* no secondary command */
mb_put_uint8(mbp, 0); /* MBZ */
mb_put_uint16le(mbp, 0); /* offset to secondary */
mb_put_uint16le(mbp, fid);
mb_put_uint32le(mbp, offlo); /* offset (low part) */
mb_put_uint16le(mbp, lenlo); /* MaxCount */
mb_put_uint16le(mbp, 1); /* MinCount */
/* (only indicates blocking) */
mb_put_uint32le(mbp, lenhi); /* MaxCountHigh */
mb_put_uint16le(mbp, lenlo); /* Remaining ("obsolete") */
mb_put_uint32le(mbp, offhi); /* offset (high part) */
smb_rq_wend(rqp);
smb_rq_bstart(rqp);
smb_rq_bend(rqp);
if (timo == 0)
timo = smb_timo_read;
error = smb_rq_simple_timed(rqp, timo);
if (error)
goto out;
smb_rq_getreply(rqp, &mdp);
error = md_get_uint8(mdp, &wc);
if (error)
goto out;
if (wc != 12) {
error = EBADRPC;
goto out;
}
md_get_uint8(mdp, NULL);
md_get_uint8(mdp, NULL);
md_get_uint16le(mdp, NULL);
md_get_uint16le(mdp, NULL);
md_get_uint16le(mdp, NULL); /* data compaction mode */
md_get_uint16le(mdp, NULL);
md_get_uint16le(mdp, &lenlo); /* data len ret. */
md_get_uint16le(mdp, &doff); /* data offset */
md_get_uint16le(mdp, &lenhi);
rlen = (lenhi << 16) | lenlo;
md_get_mem(mdp, NULL, 4 * 2, MB_MSYSTEM);
error = md_get_uint16le(mdp, NULL); /* ByteCount */
if (error)
goto out;
/*
* Does the data offset indicate padding?
* The current offset is a constant, found
* by counting the md_get_ calls above.
*/
off = SMB_HDRLEN + 3 + (12 * 2); /* =59 */
if (doff > off) /* pad byte(s)? */
md_get_mem(mdp, NULL, doff - off, MB_MSYSTEM);
if (rlen == 0) {
*lenp = rlen;
goto out;
}
/* paranoid */
if (rlen > *lenp) {
SMBSDEBUG("bad server! rlen %d, len %d\n",
rlen, *lenp);
rlen = *lenp;
}
error = md_get_uio(mdp, uiop, rlen);
if (error)
goto out;
/* Success */
*lenp = rlen;
out:
smb_rq_done(rqp);
return (error);
}
static inline int
smb_smb_readx(struct smb_share *ssp, u_int16_t fid, size_t *len, size_t *rresid,
struct uio *uio, struct smb_cred *scred)
{
struct smb_rq *rqp;
struct mbchain *mbp;
struct mdchain *mdp;
u_int8_t wc;
int error;
u_int16_t residhi, residlo, off, doff;
u_int32_t resid;
error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_READ_ANDX, scred, &rqp);
if (error)
return error;
smb_rq_getrequest(rqp, &mbp);
smb_rq_wstart(rqp);
mb_put_uint8(mbp, 0xff); /* no secondary command */
mb_put_uint8(mbp, 0); /* MBZ */
mb_put_uint16le(mbp, 0); /* offset to secondary */
mb_put_mem(mbp, (void *)&fid, sizeof(fid), MB_MSYSTEM);
mb_put_uint32le(mbp, uio->uio_offset);
*len = min(SSTOVC(ssp)->vc_rxmax, *len);
mb_put_uint16le(mbp, *len); /* MaxCount */
mb_put_uint16le(mbp, *len); /* MinCount (only indicates blocking) */
mb_put_uint32le(mbp, *len >> 16); /* MaxCountHigh */
mb_put_uint16le(mbp, *len); /* Remaining ("obsolete") */
mb_put_uint32le(mbp, uio->uio_offset >> 32); /* OffsetHigh */
smb_rq_wend(rqp);
smb_rq_bstart(rqp);
smb_rq_bend(rqp);
do {
error = smb_rq_simple(rqp);
if (error)
break;
smb_rq_getreply(rqp, &mdp);
off = SMB_HDRLEN;
md_get_uint8(mdp, &wc);
off++;
if (wc != 12) {
error = EBADRPC;
break;
}
md_get_uint8(mdp, NULL);
off++;
md_get_uint8(mdp, NULL);
off++;
md_get_uint16(mdp, NULL);
off += 2;
md_get_uint16(mdp, NULL);
off += 2;
md_get_uint16(mdp, NULL); /* data compaction mode */
off += 2;
md_get_uint16(mdp, NULL);
off += 2;
md_get_uint16le(mdp, &residlo);
off += 2;
md_get_uint16le(mdp, &doff); /* data offset */
off += 2;
md_get_uint16le(mdp, &residhi);
off += 2;
resid = (residhi << 16) | residlo;
md_get_mem(mdp, NULL, 4 * 2, MB_MSYSTEM);
off += 4*2;
md_get_uint16(mdp, NULL); /* ByteCount */
off += 2;
if (doff > off) /* pad byte(s)? */
md_get_mem(mdp, NULL, doff - off, MB_MSYSTEM);
if (resid == 0) {
*rresid = resid;
break;
}
error = md_get_uio(mdp, uio, resid);
if (error)
break;
*rresid = resid;
} while(0);
smb_rq_done(rqp);
return (error);
}
